Blog
By Siavash Ghanbari · Founder of Emojar
📑PDF Page Ranges Explained: 1-3, 7, 10- and Other Tricks
Learn the page range syntax for pulling pages out of a PDF, including open ranges, reverse order, duplicates and odd/even, with ready-to-copy examples.
Tool GuidePDFPagesReference🔓PDF Password Won't Come Off? Unlock Problems and Fixes
Wrong-password errors, restricted PDFs that open fine but won't print, files that say they aren't encrypted. How to remove a PDF password you already know.
Tool GuidePDFPasswordsTroubleshooting🖼️PDF to PNG – 5 Myths About DPI, Quality and File Size
Is 300 DPI always better? Is PNG always bigger than JPG? Is a lossless PNG identical to the PDF? Five common myths about converting PDF pages to PNG.
Tool GuidePDFPNGMyths💧PDF Watermark Myths – What a Watermark Can and Can't Do
A DRAFT or CONFIDENTIAL stamp signals status, but it won't stop copying. Six common watermark myths, plus the settings that keep pages readable.
Tool GuidePDFWatermarkMyths📌Personal Kanban: How to Set Up a Board That Keeps Work Moving
Where Kanban comes from, how to choose columns, why limiting work in progress helps, and a worked example of a small board with labels and due dates.
Tool GuideProductivityKanbanProject Management👾Pixel Art Sprites: Grid Sizes, Animation and Sharp Exports
How to pick a grid size, animate a sprite frame by frame, and export PNG, SVG, sprite sheets or GIFs that stay crisp at any scale.
Tool GuideImagePixel ArtSprites🌐Planning an Office Network With CIDR: A Subnetting Walkthrough
Carve one /22 into staff, guest, server and link subnets step by step, with the exact masks, host ranges and broadcast addresses for each.
Tool GuideDeveloperNetworkingSubnetting🗓️Printable Calendar Layouts: Month vs Year, A4 vs Letter
Monthly pages or a one-page year? Monday or Sunday start? A4 or US Letter? A quick decision guide to printing a calendar you will actually use.
Tool GuideDate & TimeCalendarPrinting✒️Reading SVG Path Data: M, L, C, Q, A and Z Commands Decoded
What each letter in an SVG path d attribute means, how relative and shorthand commands expand, and how to edit a pasted path visually.
Tool GuideDeveloperSVGVector Graphics⚖️Recipes, Rent and Maps: 6 Everyday Uses for Ratios
Ratios quietly run cooking, cleaning, shared bills and map reading. Six worked examples show which ratio calculation fits each job and the traps to avoid.
Tool GuideCalculatorsMathEveryday📏rem, em, vw or px? What Each CSS Unit Is Really Relative To
How browsers turn rem, em, %, vw, vh, ch and pt into pixels, with one length converted every way and a box sized in viewport units.
Tool GuideDeveloperCSSWeb Design🪄Remove a White Background From a Logo or Signature
Turn a logo, scanned signature or product shot on white into a transparent PNG. A walkthrough of tolerance, edge softness and the two removal modes.
Tool GuideImageImagesTransparent PNG🏖️Retirement Projection Checklist: 8 Inputs to Get Right
A retirement estimate is only as good as its inputs. Check these eight, from return and inflation to withdrawal rate, and see how much each moves the result.
Tool GuideCalculatorsFinanceRetirement🎨RGB to HEX for Design Handoff: Getting Colors Into Code
Turning a designer's RGB values into HEX codes for CSS and style guides, with the conversion math, a handoff checklist and the rounding issues to watch for.
Tool GuideColorDesign HandoffCSS🎨RGB to HSL Formula, Explained Step by Step
How RGB values become hue, saturation and lightness, with two fully worked examples you can check by hand and code-friendly formulas for each step.
Tool GuideColorMathExplainer🧪Safe Fake Test Data: Reserved Emails, 555 Numbers and Seeds
Why good mock data uses example.com emails, 555-01xx phone numbers and documentation IPs, and how a seed gives you the exact same rows on every run.
Tool GuideGeneratorsDeveloperTesting🖥️Screen Recording Problems: No Sound, Black Video and Other Fixes
Why a browser screen recording has no audio, shows a black window or won't play in some apps, and how to fix each problem before you record your next take.
Tool GuideAudio & VideoVideoRecording🔐Setting File Permissions for a Website on Linux, Step by Step
A walkthrough of chmod on a real server. 644 for pages, 755 for folders, 600 for SSH keys, 640 for secrets and setgid for a shared upload folder.
Tool GuideDeveloperLinuxServers#️⃣SHA-512 Myths: Hashing vs Encryption, Speed and Security
SHA-512 can't be decrypted, isn't a safe password store on its own and is often faster than SHA-256. Six common myths about hashing, corrected.
Tool GuideGeneratorsSecurityHashing🏦Shorter or Longer Loan Term? How to Compare the Real Cost
A 30-year loan has a lower payment, a 15-year loan costs far less overall. See the trade-off in real numbers and how to compare loan terms yourself.
Tool GuideCalculatorsFinanceLoans